Do polysemantic features hide useful structure? An interpretability debate
menhguin · x · 2026-10-16
A technical exchange on interpretability argues that polysemanticity likely contains useful structure worth studying — the fact that it keeps working suggests so.
Key points:
- Heuristic: the more capable and well-trained a model is, the denser its useful long-horizon multi-hop connections — analogous to how a 'genius brain' makes more-than-random cross-domain associations.
- Cited idea: specialized experts (MoE) act as an anti-superposition architecture, since superposition packs unrelated things together while experts resist that.
- The author acknowledges the human-brain analogy is casual, since brain and model sizes aren't comparable.
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